scholarly journals Die Nährstoffgehalte der Miesmuschel (Mytilus edulis) und der Klaffmuschel (Mya arenaria) in ihren jahreszeitlichen Schwankungen

1952 ◽  
Vol 4 (1) ◽  
pp. 88-99 ◽  
Author(s):  
Johannes Henschel
Keyword(s):  
Mytilus Edulis ◽  
Mya Arenaria

Trial Control of the Greater Clam Drill (Lunatia heros) by Manual Collection

1958 ◽  
Vol 15 (6) ◽  
pp. 1355-1369 ◽  
Author(s):  
J. C. Medcof ◽  
L. W. Thurber
Keyword(s):  
Mytilus Edulis ◽  
Mya Arenaria

Soft-shelled clams (Mya arenaria) 38 mm. long were planted 172 per m.2 in three 10 m.2 plots in a sandy flat where none occurred naturally but where there were 6 drills per m.2 feeding on mussels (Mytilus edulis). After plantings, at least 300 drills entered each plot daily. After 12 days clam survival was only 19% in the plot where there was no protection; 31% where soil was raked before planting and exposed drills removed (84% efficient); 34% where this pre-planting clearance was combined with 8 post-planting, low-tide, manual collections of surfacing drills (3% to 5% efficient). These intense efforts had little effect and would be unjustified on public beds even if much more effective. Drills kill more than half their prey without boring their shells. A higher proportion of the drill population comes to the surface by night (6%) than by day (3%) and small drills are unexplainably scarce.

Évaluation écotoxicologique de la baie des Anglais à Baie-Comeau (Québec)

1993 ◽  
Vol 28 (4) ◽  
pp. 665-686 ◽  
Author(s):  
Jocelyne Pellerin-Massicotte ◽  
Bruno Vincent ◽  
Émilien Pelletier
Keyword(s):  
Mytilus Edulis ◽  
Mya Arenaria

Résumé La baie des Anglais à Baie-Comeau (Québec) est un site industriel reconnu comme étant contaminé aux hydrocarbures et aux biphényls polychlorés (BPC). Une expérience de transfert à moyen terme de deux bivalves marins, Mya arenaria et Mytilus edulis L., a été réalisée entre un site de référence en aval de la baie des Anglais (Franquelin) et des sites contaminés près de Baie-Comeau suivant un gradient de contamination déterminé selon des données physico-chimiques antérieures. Les analyses chimiques de contaminants ont montré qu’il n’y a pas eu d’enrichissement en hydrocarbures, au mercure et en BPC pour toute la durée du protocole mais, parmi les sondes bioanalytiques choisies pour évaluer l’état de santé de cet écosystème, celles qui se sont avérées les plus sensibles chez Mya arenaria furent le glycogène et les lipides dans les gonades, et pour les deux bivalves, la fragilité de la membrane lysosomale de la glande digestive qui est un excellent indicateur de stress toxique. Les présents résultats sont compatibles avec un modèle qui consisterait à établir une évaluation ecotoxicologique d’un écosystème que l’on soupçonne perturbé par la pollution par (i) l’analyse de la bioaccumulation des substances toxiques que l’on croit présentes dans l’écosystème (hydrocarbures, BPC et métaux lourds) et (ii) l’évaluation des effets physiologiques et biochimiques des polluants à l’aide de sondes bioanalytiques appropriées.

scholarly journals Extracellular Vesicles and Post-Translational Protein Deimination Signatures in Mollusca—The Blue Mussel (Mytilus edulis), Soft Shell Clam (Mya arenaria), Eastern Oyster (Crassostrea virginica) and Atlantic Jacknife Clam (Ensis leei)

Biology ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 416
Author(s):  
Timothy J. Bowden ◽  
Igor Kraev ◽  
Sigrun Lange
Keyword(s):  
Mytilus Edulis ◽  
Crassostrea Virginica ◽  
Blue Mussel ◽  
Binding Protein ◽  
Pdz Domain ◽  
Eastern Oyster ◽  
Mya Arenaria ◽  
Beta Catenin ◽  
Soft Shell Clam ◽  
Soft Shell

Oysters and clams are important for food security and of commercial value worldwide. They are affected by anthropogenic changes and opportunistic pathogens and can be indicators of changes in ocean environments. Therefore, studies into biomarker discovery are of considerable value. This study aimed at assessing extracellular vesicle (EV) signatures and post-translational protein deimination profiles of hemolymph from four commercially valuable Mollusca species, the blue mussel (Mytilus edulis), soft shell clam (Mya arenaria), Eastern oyster (Crassostrea virginica), and Atlantic jacknife clam (Ensis leei). EVs form part of cellular communication by transporting protein and genetic cargo and play roles in immunity and host–pathogen interactions. Protein deimination is a post-translational modification caused by peptidylarginine deiminases (PADs), and can facilitate protein moonlighting in health and disease. The current study identified hemolymph-EV profiles in the four Mollusca species, revealing some species differences. Deiminated protein candidates differed in hemolymph between the species, with some common targets between all four species (e.g., histone H3 and H4, actin, and GAPDH), while other hits were species-specific; in blue mussel these included heavy metal binding protein, heat shock proteins 60 and 90, 2-phospho-D-glycerate hydrolyase, GTP cyclohydrolase feedback regulatory protein, sodium/potassium-transporting ATPase, and fibrinogen domain containing protein. In soft shell clam specific deimination hits included dynein, MCM3-associated protein, and SCRN. In Eastern oyster specific deimination hits included muscle LIM protein, beta-1,3-glucan-binding protein, myosin heavy chain, thaumatin-like protein, vWFA domain-containing protein, BTB domain-containing protein, amylase, and beta-catenin. Deiminated proteins specific to Atlantic jackknife clam included nacre c1q domain-containing protein and PDZ domain-containing protein In addition, some proteins were common as deiminated targets between two or three of the Bivalvia species under study (e.g., EP protein, C1q domain containing protein, histone H2B, tubulin, elongation factor 1-alpha, dominin, extracellular superoxide dismutase). Protein interaction network analysis for the deiminated protein hits revealed major pathways relevant for immunity and metabolism, providing novel insights into post-translational regulation via deimination. The study contributes to EV characterization in diverse taxa and understanding of roles for PAD-mediated regulation of immune and metabolic pathways throughout phylogeny.

Microbial utilization of the neurotoxin domoic acid: blue mussels (Mytilus edulis) and soft shell clams (Mya arenaria) as sources of the microorganisms

1998 ◽  
Vol 44 (5) ◽  
pp. 456-464 ◽  
Author(s):  
James E. Stewart ◽  
L.J. Marks ◽  
M.W. Gilgan ◽  
E. Pfeiffer ◽  
B.M. Zwicker
Keyword(s):  
Mytilus Edulis ◽  
Domoic Acid ◽  
Mya Arenaria ◽  
Blue Mussels ◽  
Microbial Utilization ◽  
Soft Shell ◽  
Acid Blue

Gross Structure of the Adductor Muscles of Some Pelecypods

1973 ◽  
Vol 30 (10) ◽  
pp. 1583-1585 ◽  
Author(s):  
Carol M. Morrison ◽  
Paul H. Odense
Keyword(s):  
Mytilus Edulis ◽  
Crassostrea Virginica ◽  
Adductor Muscle ◽  
Mya Arenaria ◽  
Placopecten Magellanicus ◽  
Spisula Solidissima ◽  
Arctica Islandica ◽  
Modiolus Modiolus ◽  
Adductor Muscles ◽  
Clinocardium Ciliatum

A study of the gross structure of adductor muscles of the following pelecypods showed that they conform to Morton’s grouping into the a) "Protobranchia" (Nucula proxima and Yoldia limatula), b) "shallow-burrowing lamellibranchs" (Clinocardium ciliatum, Venericardia borealis, Astarte undata, Arctica islandica, Venus mercenaria, and Spisula solidissima), c) "surface attached lamellibranchs" (Mytilus edulis, Modiolus modiolus, Modiolus demissus, Placopecten magellanicus, and Crassostrea virginica), d) "deep-burrowing and immobile lamellibranchs" (Ensis directus, Hiatella arctica, and Mya arenaria); thus providing more evidence for his classification. The adductor muscle is divided into two portions — translucent and opaque — except in the "deep-burrowing and immobile lamellibranchs", which have opaque muscles only.

Absence of Aryl Hydrocarbon Hydroxylase (AHH) in Three Marine Bivalves

1978 ◽  
Vol 35 (5) ◽  
pp. 643-647 ◽  
Author(s):  
J. H. Vandermeulen ◽  
W. R. Penrose
Keyword(s):  
Mytilus Edulis ◽  
Oil Pollution ◽  
Mya Arenaria ◽  
Fuel Oil ◽  
Ostrea Edulis ◽  
Aryl Hydrocarbon Hydroxylase ◽  
Short Term ◽  
Aryl Hydrocarbon ◽  
Marine Bivalves ◽  
Demethylase Activity

Bivalves exposed to short-term (4 d) and long-term (6 yr) oil pollution were assayed for aryl hydrocarbon hydroxylase (AHH) and N-demethylase activity. Short-term induction studies were carried out on Mya arenaria, Mytilus edulis, and Ostrea edulis incubated in aqueous extracts of Kuwait crude oil or Bunker C (fuel) oil. For the chronic-induction studies Mya arenaria and Mytilus edulis were collected from oiled clam beds (Arrow Bunker C) in Chedabucto Bay, Nova Scotia. None of the bivalves showed any basal or petroleum-hydrocarbon-induced aryl hydrocarbon hydroxylase or N-demethylase activity, as shown by their inability to metabolize benzopyrene or imipramine. In contrast, oil-free control trout and trout taken from a polluted lake readily metabolized both these compounds. The inability of these bivalves to degrade petroleum aromatic hydrocarbons and the tendency of these compounds to accumulate in their tissues present an opportunity for transfer of unaltered hydrocarbons into the food chain. Key words: aryl hydrocarbon hydroxylase, aromatic hydrocarbon, bivalve, Mya arenaria, Mytilus edulis, Ostrea edulis, petroleum, pollution

RHYTHMIC SEXUAL MATURITY AND SPAWNING OF CERTAIN BIVALVE MOLLUSKS

1932 ◽  
Vol 7 (1) ◽  
pp. 255-276 ◽  
Author(s):  
HELEN I. BATTLE
Keyword(s):  
Mytilus Edulis ◽  
Germ Cells ◽  
Deep Water ◽  
Tidal Cycle ◽  
Sexual Maturity ◽  
Mya Arenaria ◽  
Bivalve Mollusks ◽  
The Sun ◽  
Passamaquoddy Bay ◽  
New Moon

From the middle of June to the middle of September the germ cells of Mytilus edulis L. and Macoma baltica L. in Passamaquoddy bay mature during the new-moon spring tides and are spawned throughout the remainder of the lunar tidal cycle. The initiation of spawning may be due to increased temperature since the low water of the neaps occurs about midday when the mud flats are heated by the rays of the sun. Mya arenaria L. shows the same phenomenon to a lesser degree from mid-June through August. Yoldia sapotilla (Gould), a deep-water form, has a bimonthly spawning on the spring tides.

Microbial utilization of the neurotoxin domoic acid: blue mussels (Mytilus edulis) and soft shell clams (Mya arenaria) as sources of the microorganisms

1998 ◽  
Vol 44 (5) ◽  
pp. 456-464 ◽  
Author(s):  
James E Stewart ◽  
L J Marks ◽  
M W Gilgan ◽  
E Pfeiffer ◽  
B M Zwicker
Keyword(s):  
Mytilus Edulis ◽  
Domoic Acid ◽  
Mya Arenaria ◽  
Resting Cells ◽  
Placopecten Magellanicus ◽  
Blue Mussels ◽  
Microbial Utilization ◽  
Soft Shell ◽  
Enrichment Techniques ◽  
Sea Scallops

The neurotoxin domoic acid is produced in quantity by the diatom Pseudo-nitzschia multiseries and is released to the environment directly and indirectly via food chains. Presumably there is a mechanism for the biodegradation and disposal of domoic acid and as bacteria are logical candidates for such an activity, a search for bacteria competent to carry out biodegradation of domoic acid was initiated. Extensive trials with a wide variety of bacteria isolated mainly from muds and waters taken from the marine environment showed that the ability to grow on or degrade domoic acid was rare; in fact, domoic acid was inhibitory to resting cells or growing cultures of most of these bacteria. In contrast, using enrichment techniques, it was possible to isolate from molluscan species that eliminate domoic acid readily, i.e., blue mussels (Mytilus edulis) and soft-shell clams (Mya arenaria), bacteria that exhibited growth with and biodegradation of domoic acid when supplemented with low concentrations of growth factors. The species that retain domoic acid for lengthy periods, such as sea scallops (Placopecten magellanicus) and red mussels(Modiolus modiolus), only occasionally yielded bacteria with this capability. The differences may be a result of the mechanisms used by the different shellfish in dealing with domoic acid, i.e., freely available in the blue mussels and soft shell clams but likely sequestered in the digestive glands of sea scallops and red mussels and thus, largely unavailable for bacterial utilization. The results show that Mytilus edulis and Mya arenaria, almost uniquely, are prime and reliable sources of domoic acid utilizing bacteria. These findings suggest a strong possibility that autochthonous bacteria may be significant factors in the elimination of the neurotoxin in these two species of shellfish.Key words: bacteria, neurotoxin, domoic acid, elimination, bivalve molluscs.

scholarly journals Ecotoxicological evaluation of the immunocompetence of two bivalves species (Mya arenaria and Mytilus edulis) in the Saguenay Fjord including a salinity gradient

2016 ◽  
Vol 5 (2) ◽  
Author(s):  
A. Beaudry ◽  
E. Lacaze ◽  
A. Jobin-Piché ◽  
S. Masson ◽  
M. Auffret ◽  
...  
Keyword(s):  
Mytilus Edulis ◽  
Salinity Gradient ◽  
Mya Arenaria ◽  
Saguenay Fjord ◽  
Ecotoxicological Evaluation

Not available

Sign in / Sign up

Export Citation Format

Share Document